.text-center{
    text-align: center;
}
html,body{height: 100%}
@media screen and (max-width: 750px) {
    .layui-body{width: 100%;left: 0;}
    .layui-layout-admin .layui-footer{left: 0;}
    .layui-side{left: -200px;transition: all 0.6s ease;}
    .site-tree-mobile{    display: block!important;
    position: fixed;
    z-index: 100000;
    bottom: 50%;
    left: 15px;
    width: 50px;
    height: 50px;
    line-height: 50px;
    border-radius: 2px;
    text-align: center;
    background-color: rgba(0,0,0,.7);
    color: #fff;transition: all 0.6s ease;}
    .outbox{width: 100%;background-color: rgba(0,0,0,.7);height: 100%;position: relative;z-index: 9999;}
}
